Speed-changing mechanism.



APPLICATION FILED MAY 11, I917.

Patented Nov. 19, 1918.

3 SHEETS-SHEET 1.

mrvi/rm.

W. H. RUNGE.

SPEED CHANGING MECHANISM. APPLICATION FILED MAYH. 1917.

Patented N 0V. 19, 1918.

2 5 i n m m 0 f s fimwwl 1 m Z Z P m M 5 M J H l 4 #0 6 E 6. M T w! Z M wem Fag/o 17%].

A 7mm; r5.

W. H. RUNGE.

SPEED CHANGPNG MECHANISM.

APPLICATION FILED MAYH, I917- Pdtented Nov. 19, 1918.

STA A OFFICE.

WILLIAM H. BUNGE, OF SENECA FALLS, NEW YORK. ASSIGNOR TO THE SEN'ECA FALLS murac'runm G COKPANY, 0F SENECA FALLS, NEW YORK.

srnnn-cnan'emc HECHAN'ISK.

Patented Nov. 19, 1918.

Application filed Kay 11. 1917. Serial No. 167 .898.

To all whom it may concern:

Be it blown that I, WILLIAM H. Rrxorz. a citizen of the United States. residing at Seneca Falls, in the count of Seneca and State of New York. have invented a new and useful Improvement in Speed-Changing Mechanisms, of which the following is a specification.

This invention relates to speed ch mechanism of the general commonly employed on lathes for producing difl'erent relative speeds of rotation of the lathe spindle and the feed screw.

The objects of the invention are to pro vide a simplified and improved mechanism of this kind in which a plurality of gears are mounted on a gear lever or tumbler and adapted to be'moved into engagement with gears rotating about relatively fixed axes, the arrangement of theparts being such as to reduce the number of intermediate of a athe provided the improvements I the invention.

Fig. 2 1s a fragmentary transverse sectional elevation thereof. on an enlarged scale, on line 2-2, Fig. 3.

Fig. 3 is a. sectional front of, on line 33, Fig. 2.

Fig. 4 is a ditic view of a part elevation thereof the gearing connecting the lathe spindle anil lgge 12% v p in usive are diagrammatic views of a part of this showingdifferent ms of thegears to obtain different speed ratios.

7 Fig. 9 is a side elevation of the compound tumbler or gear lever detached from the machine.

r Fig. 10 is a sectional elevation thereof on line 10-10, 11.

11 is a top plan view thereof. Fig. 12 is a sectional elevation. on an enlarged scale, of the handle or knob of the speed change lever.

Fig. 13 is a transverse sectional elevation of the head end of the lathe on line 1313. Fig. 1. showing the means embodying the invention for guiding the train gear lever or tumbler into its operative positions.

Fig. l-i is a fiagmentary front elevation thereof. on an enlarged scale.

Fig. 115 is a fragmentary sectional elevation thereof. on a still larger scale. on line 1515. Fi M. V

Fig. 16 1s a fragmentary section thereof on line 16-46., 15.

A represents the usual lathe bed having a head stock 3 of any suitable construction mounted thereon. including a cone pulley I) through which power is transmittedto the lathe, and which is preferably mounted on the lathe spindle b. The lathe spindle is connected through gearing of any suitable kind (not shown) with a rotar feed stud or shaft C rotating in a removable gear case or housing 0. The feed stud C is provided with theusual change gear 0' removablv mounted on the feed stud and having a boss or sleeve portion 0' which enables this gear to be removed from the feed stud and reversed. so that either the gear 0' or the sleeve portion 6 may be adjacent to the outer endof the feed stud. The change gear 0 may be removed from the stud and replaced by an alternate gear which when not in use is suspended on a hook c on the outer portion of the-removable housing" 1.. All of these parts have heretofore been em ployed in change speed mechanisms of this kind and of themselves constitute no partof this invention.

The change ar 0 when arranged adjacent to the outer end of the feed stud C. as shown in Fig. 3. is adapted to mesh with an intermediate gear D. and when in the re versed position, in which the collar 0 is arranged adjacent to the outer portion of the feed stud, is adapted to mesh with a smaller intermediate gear D. the gears D D being suitably secured together and rotatably mounted on a stud d. The intermediate gears are arranged to be adjusted relatively to the rotary feed stud C so that either of these gears may be placed into mesh with the change gar 0' when in either of its positions or wi the alternate gear 0 when this gear is secured on the feed stud. For this purpose the stud d carrying the intermediate to clamp the yoke E it is shown in Figs.

gears D D is adjustably mounted on a yoke or bracket E, which, in turn, is preferably adjustably secured on the headstock B. In the construction shown, this yoke or bracket is adapted to be adjusted about the axis of the feed stud G, beingfor this purpose provided with a bearing portion e journaled on a sleeve or collar 6 concentric with the rotary feed stud C. The yoke or bracket E is provided with an arc-shaped slot 6 through which a set screw e passes which is adapted against movement relatively to the head-stock B. The yoke or bracket E is also provided with a slot 0* in which the stud d to vary the position of the intermediate gears D D relatively to the rotary feed stud C. Any other means ma be employed for adjusting the position 0 the intermediate gears.

Power is transmitted intermediate gears D D to a tumbler shaft F, suitably journaled in a gear case F arranged on the head stock of the lathe, by means of a series of gears mounted on a compound gear shift lever or tumbler G. In the construction shown, this gear shift lever or tumbler is pivoted on the tumbler shaft F and adapted to slide lengthwise thereon. and has two arms 9 and g carrying shift gears H H rotatably mounted on a pin it secured in the arms 9 9. Either of the gears H H is adapted to be moved into mesh with one or another of the intermediate gears D D, and a gear I is mounted on a from either of the pin '5 connecting the arms 9 g of the lever G and meshes with the shift gearH" and with a gear K arranged between the arms 9 g and splined to the tumbler shaft. The compound lever G also has an arm 9 extending outwardly through a slot or opening 9? in the gear housing and adapted to be shifted to place one or another of the shift gears H H into mesh with one or another of the gears D D.

The compound lever or tumbler G shown in the drawings is adapted to occupy three positions. In the first position, shown in Figs. 1-5, the gear H D; in the second or intermediate position, Fig. 6, the gear H meshes with the gear D; and in the third position, Figs. 7 and 8, the gear H meshes with the gear D. By means of this arrangement tumbler shaft F can be obtained by merely shifting the compound lever G. For each of these positions of the lever G a number of different speeds-can be obtained by chang-.

ing the position of the change gear 0 on the feed stud or replacing this gear by the alternate gear 0 Figs. 4 and 5, for example, show diagrammatically the arrangement of the gears when the compoundlever G. is in the extreme left position, in. which position 1 and 3, Fig. 4 showing may be adjustably secured meshes with the gear three speeds of the tions of the gearswhen the compound lever is in the extreme right-hand position, Fig. 7 showing the change gear 0 in the position shown in Fig. 3, and Fig. 8 showing the alternate gear 0 in place on the feed stud C.

Any suitable means may be provided for holding the compound lever G in any of its three positions. In the construction shown, the outer end of the lever G is provided with a handle or knob L having a stud or pin Z. Fig. 12, connected therewith and adapted to engage in any one of three holes Z in the gear housing F, the handle L being yieldingly pressed by a spring Z into engagement in one of the holes The tumbler shaft F connected with the lead lathe by suitable means speeds of the lead screw tumbler shaft, such as a cone gear lever or tumbler N of the kind commonly employed for this purpose which is movable lengthwise of the tumbler shaft F and is provided with a gear n meshing with a gear nv splined on the tumbler shaft F. The gear n is adapted to be moved into operative engagement with any one of a series of gears O forming a gear cone and mounted on the lead screw M, and is adapted to be held in this position by means of a handle or knob P on the lever N which may, if desired, be similar in construction to the knob or handle L and which is provided with a pin 11, adapted to enter into any one of a number of holes p in the housing F.

Means are preferably provided for properly guiding the gear n into mesh with the corresponding gear 0 of the gear cone. In the construction shown for this purpose the holes p are drilled through the wall of the gear casing F and pins Q are secured in the inner portions of these holes and project inwardly from the wall of the ar casing. The cone gear lever N is provided with a bifurcated portion 9 adapted to straddle the pins Q. when the lever N is being moved into one or another of its operative positions. The projecting portions of the bifurcated portion 9 prevent the lever from being moved to one side or another-of its operative positions so that the gear 1 cannot be moved into improper relation to any of the gears O of the gear cone, and the danger of breaking off the corners of the teeth of the gears O and n is eliminated.

By means of the arrangement of the change speed lever G and the gears cooperating therewith, a quickly adjustable mechanism is produced, which is simple and inexpensive in construction. The means for guiding the cone lever or tumbler into operative position also is inexpensive to manufacture and thoroughly reliable in action. By means of the combination of the cone gear lever N and the compound tumbler or gear shift lever G, a great variety of difierlead screw, a lever having a plurality of shift gears mounted thereon, said lever being slidably mountedon said shaft to place any of the gears mounted thereon into mesh with said intermediate gear, and'a gear sphned to said shaft and movable with said lever and driven by Said shift $5 2. The combination wit a lathe spindle, a lead screw. and intermediate gears driven from said spindle, of a tmnbler shaft, means for transmitting power from said tumbler shaft to the lead screw, a lever having a shift gear mounted thereon, said lever being slid ably mounted on said tumbler shaft to place said shift gear into mesh with any of said intermediate gears. and a gear splined to said tumbler shaft and movable with said lever and driven b said shift ear for transmitting power fromsaidshift. gear to said tumbler shaft.

3. The combination with a lathe Spindle,

a lead screw. and intermediate gears driven from said spindle. of a: tumbler shaft through which power is transmitted to the lead screw. a lever ha a plurality of shift gears mounted thd dn, said lever. being slidably mounted on said shaft to place any of said shift gears into engagement with any of said intermediate gears, and a spiined to said shaft and movable with said lever and driven by said shift gear. i

4. The combination with a lathe spindle,

a lead screw. and intermediate gears driven from said spindle. ofv a tumbler shaft through which power is transmitted to the lead screw. a. lever having a plurality of shift mounted thereon. said lever being shdably mounted on said shaft to place any of said shift gears into engagement with any of said intermediate gears. a gear splined to said shaft and movable with said lever. and an intermediate gear meshing with said splined gear and with one of arid shift gears for transmitting power from said shift gears to said tumbler shaft.

5. The combination of a lathe spindle, an intermediate gear driven from said lathe spindle. a lead screw. :1 set of cone gears on said lead screw. and a tumbler shaft through which power is transmitted to. said cone gears. of a lever having a plurnlitv of shiftgears mounted thereon and slidablv mounted on said tumbler shaft to place any of said shrft gears into mesh wrth sard mtermedrate gear. and a gear splined to said tumbler shaft and driven by the gears mounted on said lever. v

6. The combination of a'lat-he spindle, a lead screw, a' rotary feed stud driven from said lathe spindle. a change gear mounted on said feed stud and adapted to be held in one or another position on said feed stud, a luralit-y of intermediate gears one or an ot er of which is adapted to mesh with said change gear. a yoke on which said intermediate gears are mounted. means for adjusting said yoke about said feed stud, a turnbler shaft-through which power is transmitted to said lead screw, a lever slidably so mounted on said trmrbler shaft and having a plurality of shift gears mounted thereon and adapted to be moved into mesh with one or another of said intermediate gears, and means connected with said lever for driving as said tumbler shaft from said shift gears.

7. The combination of a lathe spindle. a lead screw, a rotary feed stud driven from said lathe spindle, a change gear mounted on said feed stud and adapted to be held in on one or another position on said feed stud, a plurality of intermediate gears one or another of which is adapted to mesh with said change gear. a yoke on which said intermediate gears are mounted. said yoke being pivoted to about the axis of said feed stud. means for securing the yoke in an adjusted position. means for adjustably securing said intermediate gears on said yoke... means for adjusting said yoke about said feed stud. a tumbler shaft through which power is transmit-ted to said lead screw. a

lever slidably mounted on said tumbler shaftand having a pluralitv of shift gears mounted thereon and adapted to be moved into mesh with one or another of said intermediate gears. and means connected with said lever for driving said tumbler shaft from mid shift gears.

8. In a. lathe. the combination with a v ing. and a bifuracted part on said lever adapted to straddle said projections to guide said lever into proper operative relation to any of the gears of said gear cone.

9. In a lathe. the combination with a lead screw. a gear cone mounted thereon. and a tumbler shaft through which power may be transmitted to said gear cone. of a lever casing, and a part on said lever ada ted to straddle any one of said pins for guiding the lever into proper operative relatlon to any of the gears of said gear cone.

vgitness my hand, this 4th day of May, 191

WILLIAM H. RUNGE.

\ Witnesses:

ADELBERT S. Davis, B. J. GORDON. 

